hibernate in action 源码 caveatemptor-0.9.5初学者很适合

				package org.hibernate.auction.command;
				
				import java.io.Serializable;
				
				/**
				 * The interface for generic commands between presentation and business tier.
				 *
				 * @author Christian Bauer 
				 */
				public interface Command extends Serializable {
					public void execute() throws CommandException;
				}